Sand-blast apparatus.



PATENTED MAR. 12, 1907.

F. M. WISE.

SAND BLAST APPARATUS. APPLICATION FILED NOT/110.1906.

2 SHEETS-SHEET 1.

Guam;

No. 847,269. PATENTED MAR. 12, 1907.

' F. M. WISE, SAND BLAST APPARATUS.

APPLICATION FILED NOV.10, 1905.

2 SHEETS-SHEET 2.

UNITED STATES FRANKLYN M. WISE, or NEW YORK,

, NEW YORK. A

SAND-BLAST APP-ARATUS.

PATENT oEEioE.

N. Y.,ASS1GNOR TOIAMERIOAN pm MOND BLAST COMPANY, on NEW YORK, N. Y., A-OORPORATIONOF Specification of Letters Patent.

Patented March 12, 1907.

Application filed November'lO, 1906. Serial No. 236,632.

borough of Manhattan, city, county, and

State of New York, have invented certain. new and useful Improvements inSand-Blast Apparatus, of which the following is a speci fication.

My invention relates to improvements in sand-blast machines of thatclass particularly adapted for cleaning the surfaces of stone, metal,wood, &c., and has as its object the providing of means for collectingand returning the sand used to the sand-reservoir .my invention.

in connection with means for facilitating the operation of the variousparts.

In the following I have described, in connection with the acompanyingdrawings, one form of device illustrating my invention, the. featuresthereof being more particularly pointed out hereinafter in the claims.

- In the drawings, Figure 1 is a side elevation, partly in section, of aportable sandblast machine, illustrating one application of Fig. 2 is aplan view of the sand-reservoir shown in Fig. 1 and its connections,parts being broken away. Fig. 3 is an enlarged cross-sectional view onthe line A B of Fig. 1 and looking in the direction of the arrows,a'ndFig. 4 is a front elevation of the sand-collector.

Similar numerals of reference indicate similar parts throughout theseveral views.

1 designates a sand-reservoir comprising a cylinder, preferably ofmetal, mounted on a base 2, suitably supported and provided i -with aconcave or hopper-shaped bottom 3 7 avalve 11.

and a top or cover 4. Access to the reservoir in order to replenish itwith sand is provided for by means of a hopper 5, said hopper having anair-tight cover comprising a rubber gasket 6, with which two covermembers 7 and 8 are adapted to engage by means of an expanding-screw 9to form an air-tight o1nt. A

10 is an inlet-pipe through which the air under pressure is forced intothe sand-reservoir, said pipe being controlled by means of A U-shapedbend 12, having a draw-off petcock 13, is provided in the airinlet pipeto collect such moisture as'may be in theair before it reachesthesand-reservoir. 14 is a tube preferably extending vertically throughthe sand-reservoir and centrally located with relation thereto andprojecting through suitable openings in the bottom 3 and cover 4. Nearthe lower end of tube 14 and 'just above the bottom 3 of thesandreservoir a series of vertically-arranged a ertures 15 are provided,through which t e sand may pass into the mixing-chamber 16 at the lowerextremity of .tube 14. To regu-.

late the admission of said to the mixing. chamber, tube 1 4 is providedwith a vertically- ,adjustable valve, said valve comprising a stem 17-,having at its upper end a handwheel 18 and at its lower end a head orplunger 19, adapted to close apertures 15 when the valve is seated. Thestem 17 has an enlarged threaded portion 20, which passes through asuitable stuffing-box 21 in tube 14, the parts being so arranged that byturning hand-Wheel 18 the valve is raised and lowered, as desired,opening moreor less of apertures 15 and permitting more or less sand toescape into the mixing-chamber.

Tube 14 at its upper end and a little below the cover 4 of thesand-reservoir is rovided with a ertures 22 ofsuch diameter t at theywill a mit sufiicient air into the sand-res: ervoir to tend to force thesand contained therein downward, but not suflicient to counteract thesuction of air from the sand-suction means, as hereinafter described.

The mixing-chamber 16 tapers, as at 23, to

form a threadednipple 24, said nipple being A adapted to receive the endof hose 25, which is adapted to convey air and sand to the object to beoperated upon, suchas wall 26.

A gage or sight is provided at one side of the sand-reservoir 1 in orderto observe the contents thereof and comprising an o ening 27 in the sideof the reservoir, covere by a strip of sheet-mica 28, and a late-glassmember 29, clamped tothe side of the reser voir by a grooved plate 30and rivets 31, a rubber gasket 32 being interposed between the plate 30and the side edges of sheet '28 and glass 29, as shown in Fig. 3, inorder to renliler the opening 27 into the reservoir airti t. e

At one side of the reservoir is mounted a sand-suction means comprisinga cylinder 33, preferably of metal and having a de flector-pl'ate 34,dividing cylinder 33 into two chambers 35 and 36, respectively. Chamber1 provided with an air-inlet pipe 37, and cham er 36 is provided withtwo air-outlets 11 is opened and air under suitable pressure.

38 and 39, respectively-one near the top and the other near the bottomof said chamber.

Air-outlets 38 and 39 dischargeinto a suction- 42 discharges and W ichin turn discharges into pipe 43, coupled with hose 44, leading into thesand-reservoir. Pipe 42. at its lower end is coupled with hose 45, whichis coupled at its outer end to a sand-collector 46, comprising a framecovered with any suitable material, preferably stiiiened canvas,hopper-shaped at the bottom, as at 47, and having a hood or deflector 48at the to Wheels 49 are provided to assist in readi y moving thecollector over the wall 26.

The collector 46 is supported on nozzle 50 at the outer end of hose 25by means of a suitable slip-ring 51. Nozzle 50 is preferably providedwith handles 52 and a detachable nose 53. Hoses 25 and 45 may beconfined in the same position relative to each other by means ofring-clamps 54. Air-inlet pipe 37 is controllable by means of a suitablevalve 55. v

The operation of the device is as follows: The reservoir having beenfilled with sand and the cover of hopper 5 being closed, valve ispermitted to pass into the reservoir and into tube 14. Hand-wheel 18 isnow turned so as to raise plunger 19 and open one or more of apertures15-, through which the sand will flow into the mixing-chamber 16,assisted by the air-pressure in the reservoir. The sand passing into themixingchamber is caught by the air passingldown through tube 14, carriedthrough hose 2'5, andforci bly projected against the face of wall 26.Valve 55 being opened, air under pressure, preferably slightly less thanthe pressure in air-inlet pipe 10, is permitted to enter chamber 35,whence it passes over deflector-plate 34 and out through outlets '38 and39 into suction chamber 40, where it creates a strong suction on pipe 42and auxiliary suc-' tion-pipe 41, tending to suck the sand fromcollector 46, into which the sand falls after being projected againstwall 26, back into the reservoir. This latter operation is generallyassisted by g avity, as the dischargenozzle 50 and collector 46are'frequently in use at a level higher than the reservoir. By the meansdescribed little sand is lost, and the -machine may be used aconsiderable length of time without replenishing, involving veryconsiderable economies in. operation, as well as great convenience -inmam ulation.

t is obvious that the arrangement described may be considerably variedfrom Without departing from the spirit of my invention, and I donotrestrict myself toany of the details shown.

What I claim, and desire to secure by Letters Patent, is p F 1. In anapparatus of the character described the combination of aportable-sandreservoir, a sand-discharge pipe, air-compression means fordrivmgthe sand from the reservoir through said pipe, means forcollectingand retaining the sand discharged'from said p'pe and means forautomatically return' ing the sand to the reservoir.

2. in an apparatus of the character described the combination of aportable sandreservoir, a sand-discharge pipe, air-compressi on meansfor driving the sand from the reservoir through said pipe, means .forcollect- I ing and retaining the sand discharged from said pipe andsuction means for automatically returning the sand to the reservoir.

3. .In an apparatus of the character described the combination of aportable sandreservoir, a sand-discharge pipe, air-compression means fordrivin the sand from the.

reservoir through said pipe, collecting" and retaining means mounted onsaid pipe for collecting and retaining the sand discharged therefrom andmeans for automatically returning the sand from the collector to thereservoir.

4. In an apparatus of the character described a sand-suction means comrising a cylinder divided into a plurality of c ambcrs, one of saidchambers forming (man-inlet and another an air-outlet, means fordeflecting air from one chamber into another and a suction chamber intowhich the air-outlet chamber discharges. 5. In an apparatus of thecharacter described a sand-suction means comprising a cylinder dividedinto a plurality of 0 one of said chambers forming an air-inlet andanother anair-outlet, means for deflecting air from one chamber-intoanother, a suction-chamber into which the air-outlet chamber discharges,an. auxiliary suction-pipe in ambers,

said suction-chamber'and means discharging into and from said auxiliarysuctionrpipe.

6. An apparatus-of the characterdescribed including a portablesand-reservoir comprising a primary mixing-chamber, a secondarymixingchamber, air-compression means connected therewith, asand-discharge pipe connected thereto, a discharge-nozzle on saidsand-discharge pipe, and means mounted on said discharge-nozzle forcollecting and retaining the sand dischargedtherefrom.

7. An apparatus of the character described including a portablesand-reservoir comprisng a primary mixing-chamber, asecondary Imixing-chamber, air-compression means con- 7 nected therewith, asand-discharge pipe connected thereto, a discharge-nozzle on saiddischarge-pi e, means mounted on said discharge-nozz e for collectingand retaining the sand discharged therefrom, and means for i thereof. vp

10. An apparatus of the character deautomatically exhausting the saidcollecting and retaining means. L

8. An apparatus of the character described for collecting and retainingthe means for auto charge-nozz matically exhausting sand to the primarymixing-chamber.

including a sand collecting and retaining -means comprising a hopperprovidedwith'a and a receiver adapted to surround a discharge-nozzlemounted on a sanddischarge pipe, and means for automatically e'xhaustmgsaid receiver of the contents scribed including a sand collecting andre- 2 5 taining means comprisinga hopper provided with a deflector-hoodand a receiver adapted to surround adischargemozzl-e mounted onasand-discharge pipe, means for automatically exhausting said receiverof the cono tents thereof and means for returning the .contents to themain su plyf '11. apparatus 0 the character de- 9. An apparatus of thecharacter describedscribed including a sand collecting and retainingmeans compris' a hopper provided with a deflector-hood an a receiveradapted to surround a discharge-nozzle mounted on a sand-discharge pipe,means for automatically exhausting said receiver of the contentsthereof, means for returning said contents to the main supply, and meansmounted on said collecting and retaining means for rendering the sameeasy to handle.

12-. An apparatus of the character described including a portablesand-reservoir adapted tobe filled solid with sand, a means forobserving the contents thereof comprising a metal frame having mountedthereln a sheet of mica said metal frame and sheet of mica beingsuitably fastened to the casing of said sand-reservoir. V

13. An apparatus of the character described including a sand-dischargenozzle comprising a reception member, handles mounted thereon, body ofasand collector and retainer and a detachable nose-piece.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

FRANKLYN M. WrsE. Witnesses VMAX. S. HAMBURGER, WILLIAM F. AsnLnY, Jr.

means for receiving the

